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E46 Xi Forum The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

Hello all. I have been having some troubles with my car but nothing serious has happened until yesterday. It wouldn't turn on until the third time I tried it and that is when the check engine light came on. It has stayed on and the car shakes during idle. I am a total newbie to fixing my own car and I have an at home diagnostic tool. I used it and this code came up: P1349. Research says it is the fourth cylinder misfiring and it might either be the spark plug or the coil. I just had all spark plugs replaced so process of elimination says it should be the coil right? Is that hard to replace? I don't want to pay shop fees and labor so if I can do it myself I would rather do that. Where should I buy parts? Does anyone have any advice? I would greatly appreciate it

What do I do if it changes with the coil? That would just be a way to verify that it is the coil right? Is it generally safe to do this on my own? I will have help from a more experienced DIYer but I want to be sure.

It used to go away if I turned the car off then on but that was before the check engine light came on with it. I will definitely be doing that. Is it urgent? I won't have time to do anything until Saturday or Sunday, but I don't want to just take it I the mechanic if I can do it myself.

The code only says that cylinder 4 is misfiring. When I did some further research I came up with it being either the coil or the spark plug and am assuming it is the coil because we replaced all the spark plugs two months ago when this first started. There was no code that pulled up when we had that done.

Sure... There are a TON of DIY stuff on this website on how to do it with LOTS of pictures. You'll need some basic hand tools but nothing expensive. You most likely already have the stuff you need.

I could probably do it now in about 15 minutes from start to finish... So allow yourself a leisurely hour or so. Already have a coil ready to install. So if you even do the switch of coils... You have a replacement. Not a hassle to get it all back apart I guess but still... Just do it the first time.

THIS is a link to do the coils on an M3... Not the same exactly... But very similar...